Reason:
So that – así que
Because – porque
Since – ya que
As – como
So as to + verbo infinitivo – Para
In order to + verbo infinitivo – para
Because of + sustantivo – a causa de
Due to + sustantivo – debido a

Sequence:
At first /first/ fisrt of all – primero
To begin with – para empezar
At the beginning of – al principio de
in the beginning – al principio
Second / secondly – segundo
Then – luego
Next – después
Later, – más tarde
After that,/Afterwards, – después,
Before that, – antes,
Eventually / finally – finalmente
In the end, – al final